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arXiv 0808.0505math-phmath.APmath.MP
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从多体量子动力学推导二维非线性薛定谔方程

Derivation of the two dimensional nonlinear Schrodinger equation from many body quantum dynamics

Kay Kirkpatrick, Benjamin Schlein, Gigliola Staffilani

摘要:

对于R^2和[-L,L]^2,我们严格地导出了具有短尺度排斥对相互作用的二维多体玻色系统在适当标度极限下的立方非线性薛定谔方程.我们首先证明收敛的BBGKY层次的解决方案,对应于多体系统,解决方案的无限Gross-Pitaevskii层次,对应于立方NLS;然后,我们证明了唯一性的无限层次,这需要数论技术在周期性的情况下。

英文摘要:

We derive rigorously, for both R^2 and [-L, L]^2, the cubic nonlinear Schrodinger equation in a suitable scaling limit from the two-dimensional many-body Bose systems with short-scale repulsive pair interactions. We first prove convergence of the solution of the BBGKY hierarchy, corresponding to the many-body systems, to a solution of the infinite Gross-Pitaevskii hierarchy, corresponding to the cubic NLS; and then we prove uniqueness for the infinite hierarchy, which requires number-theoretical techniques in the periodic case.

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